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Ampex VRX-1000
The Ampex VRX-1000, introduced by Ampex Corporation of Redwood City, California, in 1956, was the first commercially successful videotape recorder, using quadruplex recording on 2-inch tape.
Amphenol
Amphenol Corporation, founded in 1932 in Chicago as the American Phenolic Corporation, is an American maker of connectors, sensors, antennas, and cable based in Wallingford, Connecticut.
Amphetamine
Amphetamine, also known as amfetamine and marketed from 1932 as Benzedrine, is a stimulant prescribed for ADHD and narcolepsy and controlled as a Schedule II drug in the United States.
Amphiareion
Amphiareion (Αμφιάρειο), sanctuary of the healing and oracular hero Amphiaraos at Oropos on the Attica-Boiotia border, founded late 5th century BC, famed for incubation, a 110 m stoa, and the Amphiareia games.
Amphibia (TV series)
Amphibia is a Disney Channel animated series created by Matt Braly (2019-2022, three seasons) about 13-year-old Anne Boonchuy, voiced by Brenda Song, transported to a frog-populated marshland world.
Amphibian
Amphibians (class Amphibia): frogs, salamanders, and caecilians; ectothermic tetrapods with permeable skin used in cutaneous respiration. 40.7% of 8,011 assessed species are threatened; chytrid fungus is the major disease.
Amphibian Ark
Amphibian Ark (AArk), founded 2007 by IUCN SSC CBSG/CPSG, the ASG, and WAZA, coordinates ex situ rescue of amphibians threatened mainly by chytrid fungus, using Conservation Needs Assessments, grants since 2009, training, and National Programs in Brazil, Colombia, and Guatemala.
Amphibian immunity to chytridiomycosis
Amphibian immunity to chytridiomycosis is the set of host defenses, including skin bacteria, antimicrobial peptides, and immune cells, that determines whether an amphibian survives infection by the fungi Bd and Bsal.
Amphibian Man (Человек-амфибия)
Amphibian Man (Человек-амфибия): Alexander Belyaev's 1927 science-fiction novel of Ichthyander, a youth with shark gills, in Argentina; famous chiefly through the 1961 Lenfilm film by Chebotarev and Kazansky with 65 million viewers and Trieste awards.
Amphibians and reptiles of Mount Rainier National Park
Amphibians and reptiles of Mount Rainier National Park: 14 amphibian species (Cascades frog, western toad, giant and lungless salamanders) and 5 reptiles (garter snakes, rubber boa, alligator lizard), their surveys, habitats, and climate threats.
Amphibians of Australia
Australia's amphibians are all frogs, about 260 native species as of 2025, nearly 90% endemic, descended from ancient Gondwanan and later Asian lineages, with 49 threatened or extinct.
Amphibians of Brazil
Brazil has the richest amphibian fauna of any country, with 1,251 species, most of them frogs and toads; the Atlantic Forest holds most endemic and threatened species.
Amphibians of California
The amphibians of California comprise about 71 to 74 salamander, frog, and toad species, ranking second among US states, with roughly 65% endemic and 9 species federally listed.
Amphibians of India
The amphibians of India comprise 454 recorded native species, 411 frogs and toads, 2 salamanders, and 41 caecilians, of which 359 are endemic to India.
Amphibians of Japan
Japan hosts about 95 native amphibian species of salamanders and frogs, 80 to 88% endemic, including the Japanese giant salamander, one of the world's largest amphibians.
Amphibians of Madagascar
The amphibians of Madagascar consist entirely of endemic frogs, with 410 described species as of 2023, no native salamanders or caecilians, and habitat loss as the main threat.
Amphibians of New Zealand
The amphibians of New Zealand consist of four surviving native Leiopelma frogs, three extinct endemic species, and three Australian frogs introduced in the nineteenth century.
Amphibians of Papua New Guinea
The amphibians of Papua New Guinea consist entirely of frogs, with 398 documented species, 318 endemic, the richest frog fauna in Melanesia on about 7% of global species.
Amphibians of the Caribbean islands and Lesser Antilles
The amphibians of the Caribbean islands and Lesser Antilles are a fauna of about 248 frog species, around 84% endemic, dominated by the genus Eleutherodactylus.
Amphibians of the United States
The amphibians of the United States comprise roughly 300 to 354 species of frogs, toads, and salamanders, with no native caecilians and about a quarter of the world's salamander diversity.
Amphibious assault ship
An amphibious assault ship is a large warship that carries Marines and lands them ashore by helicopter and landing craft, designated LHA or LHD in the US Navy.
Amphibious automobile
An amphibious automobile is a road-capable motor vehicle that operates on both land and water, best known through the wartime DUKW and the Amphicar 770, the only mass-produced civilian model, sold from 1961 to 1965.
Amphibious Combat Vehicle
The Amphibious Combat Vehicle (ACV) is an eight-wheeled amphibious armored vehicle built by BAE Systems for the United States Marine Corps, replacing the tracked Assault Amphibious Vehicle.
Amphibious transport dock
An amphibious transport dock (LPD) is a warship that carries and lands a landing force by landing craft, amphibious vehicles, and helicopters for expeditionary warfare missions.
Amphibious vehicle
An amphibious vehicle, also called an amphibian vehicle, is a self-propelled vehicle that can travel both on land and in water, from the WWII Landing Vehicle Tracked to the Marine Corps' modern ACV.
Amphibious warfare
Amphibious warfare: military operations launched from the sea by an amphibious force to land forces within the littorals. Covers assault, raid, withdrawal types; Gallipoli-to-Normandy history; OMFTS doctrine; US 31-ship fleet and PLA brigades.
Amphibole
Amphibole, or the amphibole group, is a supergroup of rock-forming inosilicate minerals defined by a double chain of silica tetrahedra, abundant in intermediate igneous and metamorphic rocks.
Amphibolite
Amphibolite is a coarse-grained metamorphic rock composed mainly of hornblende and plagioclase, formed from basalt or gabbro, and quarried for highway aggregate and as dimension stone sold as black granite.
Amphicar
The Amphicar, also sold as the Aquacar, is an amphibious automobile built in West Germany from 1960 to 1968, with 3,878 made, mostly for the United States.
Amphicyon
Amphicyon is an extinct Miocene genus of bear-dogs (Amphicyonidae), type species A. major Blainville 1841, known from Europe, North America, Asia, and Africa, with three North American species from about 18 to 14 Ma.